Non-Woven Geotextiles as Interlayers in Concrete Pavement
Non-woven geotextiles can be used in unbonded concrete overlay systems to separate the existing concrete pavement from the new concrete pavement. The material proved to be cost-effective, required minimal training and equipment during construction, and can be placed rapidly.
How Does It Work?
The basic process for using non-woven geotextiles in construction projects is:
- The non-woven geotextile material is placed shortly before paving (no more than two to three days). This helps reduce the potential for the material to be damaged.
- The material is rolled on the surface. It needs to be tight with no wrinkles or folds to minimize the potential for the material to be disturbed by the paver.
- The material is secured with pins pushed through galvanized discs placed approximately six feet apart.
- The non-woven geotextile material needs to be lightly damp prior to concrete placement to prevent drawing water from the mix.
- The non-woven geotextile should not be exposed to heavy traffic until paving is complete. Avoid driving on the non-woven geotextile material unless necessary.
What Are The Benefits?
Using non-woven geotextiles for concrete pavement helps to prevent reflective cracking. It allows the drainage of infiltrated water and provides bedding to reduce bearing stresses and improves long-term performance.